Changing preferences in app not desktop

I run Audirvana on a headless Mac Mini. So my main interaction with the application is via the iPad or iPhone. When I want change any preferences or accidentally press play before the day is on and it routes via the Mac speakers, I have to use a remote app to access the Mac interface and preferences. This is clumsy and frustrating particularly since the preferences are no longer a separate window but buried us a confusing interface. I would love to be able to alter the preferences via the app. It would be so much simpler and more elegant.